// JavaScript Document
function TreeMenu(node,id)
	{
	 var sibling = document.getElementById(id);
	 
	 if (sibling.style.display == 'none')
	 {
	  if (node.childNodes.length > 0)
  {
	   if (node.childNodes[0].tagName == "IMG")
	   {
	    node.childNodes[0].src = "minus.gif"; //替换为展开时的图片
	   }
	  }
	 
	  sibling.style.display = '';
	 }
	 else
	 {
  if (node.childNodes.length > 0)
	  {
	   if (node.childNodes[0].tagName == "IMG")
	   {
	    node.childNodes[0].src = "plus.gif";  //替换为收起时的图片
	   }
	  }
	  sibling.style.display = 'none';
	 }
}